* warning: Illegal offset type in isset or empty in W:\xampp\htdocs\disa1.5\repos\includes\bootstrap.inc on line 994.
* warning: Illegal offset type in W:\xampp\htdocs\disa1.5\repos\includes\bootstrap.inc on line 995.
* warning: Illegal offset type in W:\xampp\htdocs\disa1.5\repos\includes\bootstrap.inc on line 999.
* Caught exception when retrieving ListMetadataFormats: couldn't connect to host
* Caught exception when retrieving ListSets: couldn't connect to host

I get these errors using Drupal 6.19 and xc installed with the the profile. Happens when I go to an OAI provider site - in this case http://open-archive.highwire.org/ - Oxford Journals.
I am behind a University firewall which uses a proxy on port 8080.

Any clues would be hugely appreciated. Many thanks